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Built-up roofing systems (BUR) are a popular choice for buildings with a flat or low-sloped roof. Made of alternating layers of bitumen (asphalt) and reinforcing fabric (fiberglass), the surface of BUR systems is layered with fine gravel or small stone. Types of Built-up Roofing Common built-up...
Read Full Article: Built-up Roofing (BUR): What Is It & How Does It Work?
